:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-bg: #1a1a2e;
    --card-bg: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #718096;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--dark-bg);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
    min-height: 100vh;
    color: var(--text-primary);
    animation: backgroundShift 20s ease infinite;
}

@keyframes backgroundShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* Animated Header */
.animated-header {
    position: relative;
    overflow: hidden;
}

.logo-container {
    position: relative;
    z-index: 1;
}

.logo-icon {
    font-size: 4rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s ease-in-out infinite, rotate 10s linear infinite;
    display: inline-block;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

/* Search Card */
.search-card {
    background: var(--card-bg);
    border-radius: 20px;
    animation: slideUp 0.6s ease-out;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.search-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2) !important;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Form Controls */
.form-control, .form-control-lg {
    border-radius: 10px;
    border: 2px solid #e2e8f0;
    transition: all 0.3s ease;
    padding: 12px 16px;
}

.form-control:focus, .form-control-lg:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    transform: translateY(-2px);
}

.form-label {
    color: var(--text-primary);
    margin-bottom: 8px;
}

/* Search Button */
.search-btn {
    background: var(--primary-gradient);
    border: none;
    border-radius: 12px;
    padding: 14px 28px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.search-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.search-btn:hover::before {
    width: 300px;
    height: 300px;
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.search-btn:active {
    transform: translateY(0);
}

.search-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Results Section */
#resultsSection {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.result-item {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
    animation: slideInLeft 0.5s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.result-item:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.file-path {
    font-weight: 600;
    color: #667eea;
    font-size: 1.1rem;
    margin-bottom: 10px;
    word-break: break-all;
}

.match-item {
    background: white;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 10px;
    border-left: 3px solid #4facfe;
    transition: all 0.2s ease;
}

.match-item:hover {
    background: #f0f4ff;
    transform: translateX(3px);
}

.line-number {
    display: inline-block;
    background: var(--primary-gradient);
    color: white;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-right: 10px;
}

.occurrence-badge {
    background: var(--success-gradient);
    color: white;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
}

.match-content {
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    margin-top: 8px;
    padding: 8px;
    background: #f8f9fa;
    border-radius: 4px;
}

/* Loading Animation */
.spinner-border {
    width: 1rem;
    height: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .logo-icon {
        font-size: 3rem;
    }
    
    .display-3 {
        font-size: 2.5rem;
    }
    
    .search-card {
        margin: 10px;
    }
    
    .result-item {
        padding: 15px;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #1a1a2e;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-gradient);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

/* Badge Animations */
.badge {
    animation: bounce 0.5s ease;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

/* History Sidebar */
.history-sidebar {
    background: var(--card-bg);
    border-radius: 20px;
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.history-item {
    background: #f8f9fa;
    transition: all 0.2s ease;
    border-left: 3px solid transparent !important;
}

.history-item:hover {
    background: #e9ecef;
    border-left-color: #667eea !important;
    transform: translateX(3px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.history-item:active {
    transform: translateX(0);
}

/* Progress bar */
#searchProgress {
    margin-top: 10px;
}

#searchStatus {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Duplicates Section */
#duplicatesSection {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 4px solid #2196f3;
    animation: slideInDown 0.5s ease-out;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#duplicatesSection .table {
    margin-top: 15px;
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

#duplicatesSection .table thead {
    background: var(--primary-gradient);
    color: white;
}

#duplicatesSection .table tbody tr:hover {
    background: #f0f4ff;
}

#duplicatesSection .list-unstyled {
    max-height: 150px;
    overflow-y: auto;
    font-size: 0.85rem;
}

/* Export Button */
#exportButtonGroup .dropdown-toggle {
    border-radius: 8px;
    transition: all 0.3s ease;
}

#exportButtonGroup .dropdown-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

#exportButtonGroup .dropdown-item {
    transition: all 0.2s ease;
}

#exportButtonGroup .dropdown-item:hover {
    background: var(--primary-gradient);
    color: white;
    transform: translateX(5px);
}